When the 100th PSSL meeting was held in Cambridge last year, I made public the (almost) complete list of speakers and titles of talks at PSSL meetings, which I've been keeping since they started. A number of people suggested that it would be interesting to have a similar list for the summer CT meetings. I'm afraid that compiling a full list of speakers at such meetings would be beyond my resources, but I thought it might be of interest to make a list of the dates and locations of the meetings. So here is my first attempt at compiling it; it's in the form of a plain TeX document, but should be easily readable as text. At present it begins with the first Isle of Thorns meeting in 1974, simply because that was the first such meeting that I attended; information on earlier meetings, and corrections to the information below, are very welcome. Peter Johnstone %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \centerline{\bf Category Theory Summer Conferences} \bigskip The following is intended to be a list of (mostly week-long) international conferences organized by, and attended mainly or exclusively by, category-theorists during the (northern) summer months (which I have interpreted broadly as June to September, inclusive). Dates quoted are arrival and departure dates: in most cases there were no lectures on the arrival date, and in some there were none on the departure date. Unless otherwise indicated, the official topic of the meeting was simply `Category Theory' or something equivalent; the meetings with other subjects are included because they were attended by a large proportion of `the usual suspects'. For meetings organized under the aegis of a body not solely devoted to category theory (MFI Oberwolfach, the London Mathematical Society, MSRI etc.) the meeting venue is shown in square brackets. \bigskip {\settabs\+worraw & worraworraworrawo & worraworrawo & worra\cr \+Year & Place & Dates & Subject if not CT \cr \+ & & \cr \+1974 & Isle of Thorns & 27/7--2/8 & \cr \+1974 & [Oberwolfach] & 3/8--9/8 & \cr \+1975 & [Oberwolfach] & 29/6--5/7 & \cr \+1976 & Isle of Thorns & 25/6--31/6 & \cr \+1977 & [Durham] & 9/7--21/7 & Applications of Sheaves\cr \+1977 & [Oberwolfach] & 31/7--6/8 & \cr \+1979 & [Oberwolfach] & 8/7--14/7 & \cr \+1980 & Amiens & 6/7--12/7 & (In memory of Ch.~Ehresmann)\cr \+1980 & Ottawa & 10/8--16/8 & Categorical Topology \cr \+1981 & Gummersbach & 5/7--10/7 & \cr \+1981 & Cambridge & 19/7--25/7 & \cr \+1982 & Isle of Thorns & 11/7--16/7 & \cr \+1983 & [Oberwolfach] & 18/9--24/9 & \cr \+1984 & Murten & 23/7--28/7 & \cr \+1985 & Isle of Thorns & 14/7--19/7 & \cr \+1985 & Bangor & 21/7--25/7 & Algebraic Homotopy Theory\cr \+1986 & Cambridge & 20/7--26/7 & \cr \+1987 & [Boulder] & 14/7--20/7 & Categories in Computer Science \&\ Logic\cr \+1987 & Louvain-la-Neuve & 26/7--1/8 & \cr \+1988 & Isle of Thorns & 10/7--15/7 & \cr \+1988 & Praha & 21/8--27/8 & Categorical Topology\cr \+1989 & Bangor & 3/7--7/7 & \cr \+1990 & Como & 22/7--28/7 & \cr \+1991 & [Durham] & 20/7--30/7 & Applications of Categories in Computer Science\cr \+1992 & Isle of Thorns & 12/7--17/7 & \cr \+1993 & [MSRI] & 11/7--24/7 & Universal Algebra \&\ Category Theory \cr \+1994 & Tours & 24/7--29/7 & \cr \+1995 & Halifax & 9/7--15/7 & \cr \+1995 & [Cambridge] & 6/8--12/8 & (part) Category Theory \&\ Computer Science \cr \+1996 & Isle of Thorns & 7/7--12/7 & \cr \+1996 & Cape Town & 14/7--20/7 & (B.~Banaschewski 70th birthday) \cr \+1997 & Vancouver & 13/7--19/7 & \cr \+1999 & Coimbra & 18/7--24/7 & \cr \+2000 & Como & 16/7--22/7 & \cr \+2002 & Haute-Bodeux & 7/9--12/9 & (European meeting)\cr \+2003 & [Toronto] & 22/9--28/9 & Categorical Structures for Descent \cr \+2004 & Vancouver & 18/7--24/7 & \cr \+2005 & Macquarie & 10/7--16/7 & (R.~Street 60th birthday)\cr \+2006 & White Point & 25/6--1/7 & \cr \+2007 & Carvoeiro & 17/6--23/6 & \cr \+2008 & Calais & 22/6--28/6 & \cr \+2009 & Cape Town & 28/6--4/7 & \cr \+2010 & Genova & 20/6--26/6 & \cr \+2011 & Vancouver & 17/7--23/7 & \cr \+2012 & Coimbra & 8/7--14/7 & (G.~Janelidze 60th birthday) \cr \+2013 & Macquarie & 7/7--13/7 & \cr \+2014 & Cambridge & 29/6--5/7 & \cr \+2015 & Aveiro & 14/6--20/6 & \cr \+2016 & Halifax & 7/8--13/8 & \cr \+2017 & Vancouver & 16/7--22/7 & \cr } \end [For admin and other information see: http://www.mta.ca/~cat-dist/ ]